Bed-lasting machine



Feb. 3. 19.2.5.

M. T. DENNE BED LASTING MACHXNE Filed July 5. 1924 W5/Wai MM TQM,

afm/fr Patented Feb. 3, 1925.

unirse sr S P T E.

MARK THOMAS DENNE, 'or LONDON, ENGLAND l BEDi-LASTING MACHINE. Y

Application led July 5,

Y clamp.

The main object of my invention yis to 'provide a toe-lasting machine with a heel pad actuating means that will greatly facilitate and expedite the clamping and unclamping of the shoe; and which may be made so as to leave the operators both hands free for positioning, adjusting or removing the shoe, thereby saving time. Y

In yaccordztnce with an important feature of my invention I provide a bed-lasting chine with a heel clamp that is under complete control, to clamp or unclamp the work, by thev operators merely operating a pedal lever. The heel clamp may be actuated automatically in one direction-for instance in the direction to clamp the heel-and moved in the opposite direction by the operators depressing rthe treadle. Further, the mechanism may be such that the automatic means actuate the heel pad in one direction against the action of a spring thattcnds to move the pad in the opposite direction, the treadle lever in suchk case merely reversingor throwingy out of action the automatic means and thereby permitting the spring referred to to 1Ipove, for instance to retract, the heel pad. indiated, the openator need depress the treadle* only at the time he .is placing the shoe in and at the time he is removing the shoe from the machine. Further, the m0- ment he has properly positioned the shoefor which purpose both his hands are required-he releases the treadle and the shoe is at once clamped. Similarly, when the shoe is lasted he grasps it with both hands and simultaneously depresses the treadle so that the shoe is at once free to be removed. The means whereby the heel pad is moved so as to clamp the shoe, may beof such a character that whilst it will adapt itself even to the slightest variations in the work (for instance one shoe upper may be thicker than another), it will nevertheless preclude diiierent lengths of shoes.

rotation. Y

Attached to the carriage 7 is a bracketV the use of means operating about as 1924. Serial No. 724,480.

i tengas the possibility of the shoe being moved rearwardly Vby any pressure' brought to bear when the toe is being lasted; Y

I propose tol describe,\by vway of example a preferred constructional form of-my invention but I wish it to be understood that ,i

the scope of my invention is not limited tothat particular form.

In the accompanying drawingv Fig. v1

showsmyinvention in front' elevation and` Fig. 2 is a right hand side view partly in section of the means for impartingVmovement in one direction to the heelpad.

In said drawing the chanacterA indicates the usual slide that supports or isprovided with the jack frame 8. The slide .is adjustable on bearings in the base of the machine, .for instance by screw and hand-wheel, to set the apparatus at least approximately to suit These parts being well known are not further described. l

The heel clamp l, o any :suit-able construction, is secured by screws 2 to the end of a sliding head 3 which,A in turn is Vsecured tothe spindle 4 by screw 5 Iand washer 6. v r

The spindle'4 is supported so as to be slidable in a bearing in a carriage-7 that is 'carried on segmental rails on the jack frame 8, means being provided to clamp the carriage after being set .up or down on its support to suit different shapes of lasts.

The carriage 7 has a projection 7'a on which lthe head 3 slides and by which the spindle 4 and heel` pad l are held against that is forme-d or provided with a lcylindrical chamber 9 that extends at right angles with respect to the spindlef4 and into which chamberthe right hand end 4of the said spindle projects.

Supported in bearings at the ends of the chamber 9 is a second spindle marked 12. on one end of which a snail cam 11 is fixed and against which the spindle 4 is held by a sprlng or springs 10. It will be seen that by rotating the spindle in one direction the snail cam will permit the springs 10 to move the heel pad away from the last, i.' e., to

a spring 13 thatI is under considerable tension and which normally maintains the spindle 12 so that the snail cam 11 maintains the heel pad in its most advanced position.

The longitudinal axis of the spindle 4 is in the plane in which the axis of the cam 11 lies so that to whatever position the snail cam be rotated it will offer a positive resistance to the movement of the spindle and heel pad 1 by pressure on said pad.

By the arrangement of the snail cam as described and by reason of the fairly powerfulaction of the coil spring 13 the pad will be made to press with a very firm pressure against the shoe andit will not permit any retrograde movement of the shoe no matter what lpressure be brought to bear .during the operation of lasting the toe.

To prevent overrunning of the snail cam, a stop 21 is provided that comes against the spindle l (or a step cut therein) when the cam has moved the pad tothe eXtreme advanced position.

Secured to the other end of the spindle 12 (which projects outside the chamber 9) is a drum 14. it being shown secured to the spindle by a set screw having an extension 15 to form a handle and attached to the drum is a' chain 16 the other end of which is secured in an adjustable manner to a lever 17 which is iiXed on a pedal shaft 18 having a pedal lever 19 secured at a position convenient to the workman.

, As shown the chain 16 passes over a roll on the lever 17 and its end is provided with a hook'20 to be engaged with one or other of the link pins of the chain so that the effective length of the latter may be adjusted accordingly as the carriage 7 is set up or down 1on the jack frame 8.

The operation is as follows: The operator, having hold of the shoe with both hands, .depresses the treadle 19. Through the chain 16 the spindle 12 and snail cam 11 are rotated in oppositionto the tension of the coil spring 13. This at Ionce permits the sliding spindle 4t' and the heel pad 1 to be moved, by the spring or springs 10, to make room for the shoe being placed in position on its supports. The moment the shoe is properly placed7 and before, possibly, he lets go of the shoe, the opera-tor releases the treadle, and the snail will instantly rotate and cause the heel pad to be pressed with considerable force against the heel, thereby firmly clamping the shoe in position.

Then the. lasting has been completed7 the operator grasps the shoe with both hands, and simultaneously depressesr the treadle, when the shoe may at once be removed.

rEhe handle 15 is provided for emergency use as the main object of the invention is to provide heel pad operating mechanism by the use of which the workmans both hands are left free to handle the work.

`What1 claim is 1. A pedal controlled heelrpad in which the heel pad is carried by a slidable but non-rotatable spindle, a spring tendingto move the spindle in a direction away from its mostadvanced position and a spring'operated device whereby the spindle and pad are normally held in their most advanced position.

2. In a bed-lasting machine a pedal controlled heel pad having in combination a non-rotatable slidable spindle, la second spindle at an angle with respect to the first, and adapted to be rocked, a snail cam on the second spindle arranged to contact with the end of the first, a spring tending to rotate the snail cam and its spindle in the direction to move the heel-pad against the last, a stop to prevent overrunning of the snail cam and a connection actuated by a treadle to rotate the snail cam so as t0 permit the heel pad to move away'from the last.

3. In a bed-lasting machine a heel pad operating mechanism having in combina tion, automatically acting means to move the heel pad aga-inst the last and to lock the pad against retrograde movement, a pedal actuated device to operate said means in the direction to'bring about the releasing of the last, and other automatically acting means whereby the pad will be moved away from the last after the pedall actuated means have been 'operated7 substantially as set forth.

MARK THQMAS DENN E. 

